F# discrepancy

Fragment shader extension (fs) is used for F# files. D may cause confusion

[miniwolf]

A better extension would be .glsl then you could specify shaders like this:
phongVS.glsl and phongFS.glsl

[hhanesand]

There is also a plugin you can install to get syntax highlighting in Eclipse in .glsl files

[cutpix]

You can name it like you want...